The best Calendar alternative to Google Workspace is CryptPad, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Google Workspace and 14 are Calendar Apps so hopefully you can find a suitable replacement. Other interesting Calendar App alternatives to Google Workspace are Nextcloud Hub, eigen, Kolab and Zimbra Collaboration Suite.
CryptPad is a private-by-design alternative to popular office tools and cloud services. All the content stored on CryptPad is encrypted before being sent, which means nobody can access your data unless you give them the keys.
France
EU
Nextcloud is the most deployed on-premises file share and collaboration platform. Access & collaborate across your devices. As fully on-premises solution, Nextcloud Hub provides the benefits of online collaboration without the compliance and security risks.
GermanyEU
Your own workspace. A self-hosted, open source alternative to Google Workspace: mail, drive, docs, sheets, slides, calendar and chat.
NetherlandsEU
Kolab provides a FOSS communication & collaboration solution that can be completely self-hosted. Take back control of your data and access it via the webinterface, or existing mobile & desktop clients.
Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and dramatically reduces TCO compared to legacy platform vendors.
United States
Nino is the modular workspace for professionals. It is a collection of software that can interoperate with each other on the block-level from one uniform interface.
United States
Wimi is the ultimate productivity tool. It integrates all the essential applications to facilitate teamwork. Wimi saves time to managers and entrepreneurs working with teams and clients.
FranceEU
Kolab Now provides a suite of intuitive apps in a user friendly environment to make your day to day online comms easier, smarter and most importantly; secure.
Switzerland
Zillum is an integrated bundle of seven applications to help families communicate, share and collaborate between themselves. This includes emailing, messaging, file storage, password management, word processor, spreadsheet, and presentation tools for content creation.
India
Hub For Teams gives you and your team 100% control of your data and workspace. Enjoy enterprise collaboration features such as project management, discussion rooms, and much more.
Virtual Office, Online Office, Digital Learning Space, Online Groupware - ContactOffice, Keep a virtual office on the web. Share documents, contacts, calendar, tasks, ... with clients, students, suppliers, friends or family.
BelgiumEU
Mailture, a secure, business-oriented email service, is made to cater to all your emailing needs. With top-notch collaboration and communication features, Mailture offers much more than your usual inbox.
United Kingdom
